World War Z is just the latest pop-culture incarnation of the Zombie Apocalypse. Adam Frank says the zombies keep coming because they're trying to tell us something.
MPC/Paramount Pictures
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Crew members unload a catch of sockeye salmon at Craig, Alaska, in 2005. Researchers say fish are being found in new areas because of changing ocean temperatures.
Melissa Farlow/National Geographic/Getty Images
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Wild bees, such as this Andrena bee visiting highbush blueberry flowers, play a key role in boosting crop yields.
Left photo by Rufus Isaac/AAAS; Right photo courtesy of Daniel M.N. Turner
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Left photo by Rufus Isaac/AAAS; Right photo courtesy of Daniel M.N. Turner

Wild Bees Are Good For Crops, But Crops Are Bad For Bees

A map depicts temperature changes over the past 20 years, compared to the average between 1901 and 1960. "The period from 2001 to 2011 was warmer than any previous decade in every region," according to the National Climate Assessment.
NOAA NCDC/CICS-NC
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